Physical and Chemical Agents problems
- 1. Iodophores are mixture of
Options- A. iodine and aldehydes
- B. iodine and surface active agents
- C. iodine and alcohols
- D. iodine and phenols Discuss
Correct Answer: iodine and surface active agents
- 2. All of the following are sporicidal except
Options- A. glutaraldehyde
- B. ethylene oxide
- C. formaldehyde
- D. alcohol Discuss
Correct Answer: alcohol
- 3. Complete destruction of the microorganisms is commonly known as
Options- A. disinfection
- B. sterilization
- C. antisepsis
- D. none of these Discuss
Correct Answer: antisepsis
- 4. Which of the following is best used for long term storage of microbial samples when carried out properly?
Options- A. Storage in a freezer at -10°C
- B. Storage in a freezer at ultra low temperatures (-70°C)
- C. Storage in a refrigerator on an agar slant
- D. Storage on a petri plate at room temperature Discuss
Correct Answer: Storage in a freezer at ultra low temperatures (-70°C)
- 5. Which of the following compounds are commonly used as general antiseptics to treat cuts and scratches?
Options- A. Aldehydes
- B. Ethylene oxide
- C. Halogens
- D. None of these Discuss
Correct Answer: Halogens
- 6. If a canning procedure is not properly followed, which type of microbe is most likely to grow in the canned food?
Options- A. Obligate Aerobe
- B. Acidophile
- C. Mesophile
- D. Obligate Anaerobe Discuss
Correct Answer: Obligate Anaerobe
- 7. Which of the following disinfectants act by disrupting microbial membranes?
Options- A. Cationic detergents
- B. Halogens
- C. Heavy metals
- D. Aldehydes Discuss
Correct Answer: Cationic detergents
- 8. Which of the following skin disinfectant(s) is/are most frequently used?
Options- A. Isopropyl alcohol
- B. Ethyl alcohol
- C. Both (a) and (b)
- D. none of these Discuss
Correct Answer: Both (a) and (b)
- 9. Which of the following methods will not sterilize?
Options- A. Aqueous glutaraldehyde for 10 hours
- B. Dry heat at 171°C for 1 to 2 hours
- C. 121°C at 15 lb/in pressure for 15 to 20 minutes
- D. 100°C boiling water for 30 minutes Discuss
Correct Answer: 100°C boiling water for 30 minutes
- 10. Which of the following articles can be sterilized in an autoclave?
Options- A. Gloves
- B. Culture media
- C. Dressing material
- D. All of these Discuss
Correct Answer: All of these
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